body,html {
    height: 100%;
    padding: 0;
    margin: 0;
}

.title_div {
    text-align: center;
    height: 20%;
    display: flex;
    justify-content: center;
}

.core_div {
    display: flex;
    justify-content: center;
}

form {
    border: 1px solid black;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 10px 10px 10px gray;
}

table td {
    padding: 10px;
}

tr td:first-child {
    text-align: right;
}

.error {
    color: red;
}

.code {
    width: 40px;
}

.code_img {
    width: 60px;
    height: 40px;
    margin-left: 20px;
}

.code_div {
    display: flex;
    align-items: center;
}

